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block: fixup block IO unplug trace call

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It was removed with the on-stack plugging, readd it and track the
depth of requests added when flushing the plug.

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Jens Axboe
2011-04-12 10:12:19 +02:00
parent d9c9783317
commit 94b5eb28b4
3 changed files with 22 additions and 10 deletions
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include/trace/events/block.h
+6 -5
View File
@@ -401,9 +401,9 @@ TRACE_EVENT(block_plug,
DECLARE_EVENT_CLASS(block_unplug,
TP_PROTO(struct request_queue *q),
TP_PROTO(struct request_queue *q, unsigned int depth),
TP_ARGS(q),
TP_ARGS(q, depth),
TP_STRUCT__entry(
__field( int, nr_rq )
@@ -411,7 +411,7 @@ DECLARE_EVENT_CLASS(block_unplug,
),
TP_fast_assign(
__entry->nr_rq = q->rq.count[READ] + q->rq.count[WRITE];
__entry->nr_rq = depth;
memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
),
@@ -421,15 +421,16 @@ DECLARE_EVENT_CLASS(block_unplug,
/**
* block_unplug_io - release of operations requests in request queue
* @q: request queue to unplug
* @depth: number of requests just added to the queue
*
* Unplug request queue @q because device driver is scheduled to work
* on elements in the request queue.
*/
DEFINE_EVENT(block_unplug, block_unplug_io,
TP_PROTO(struct request_queue *q),
TP_PROTO(struct request_queue *q, unsigned int depth),
TP_ARGS(q)
TP_ARGS(q, depth)
);
/**